<div dir="ltr"><div class="gmail_default" style="font-size:small">So I did a quick test removing the second condition</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">if ((cm[x] == 0)) { // or (cm[x] > maxDistance)) {<br> cm[x] = 999;<br> }</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">This is working! Now I need to find out why the > maxDistance condition is causing the failure.<br></div><div class="gmail_default" style="font-size:small">Output:</div><div class="gmail_default" style="font-size:small">--- Miniterm on /dev/ttyUSB-sensors 115200,8,N,1 ---<br>--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---<br>cm[0] = 0<br>cm[1] = 93<br>cm[2] = 91<br>cm[3] = 90<br>cm[4] = 252<br>| us_Left = 999cm | us_Mid = 93cm | us_Right = 91cm | ir_Left = 90cm | ir_Right = 252cm | Time = 46mS<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Dec 17, 2021 at 5:35 PM Rud Merriam via DPRGlist <<a href="mailto:dprglist@lists.dprg.org">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Okay, so we know it is happening in the handling of the
conditional. Run it twice. Once with the test for maxDistance
removed and once with the test for equality removed. Also, add a
print out of <i>maxDistance</i>. Need to make sure it is not
being changed although the test with '200' there should show it
isn't. <br>
</p>
<p>If you get the same results I'm going to start drinking. <br>
</p>
<p>Actually, I'll start wondering about the build process. I'm not
familiar with PlatformIO. The Arduino IDE takes all the files,
rearranges them, and then compiles the resulting file. That's
unlike most C++ build systems. The "rearranging" can lead to some
strange issues. <br>
</p>
<div><font face="Comic Sans MS" color="#000080"> <br>
-73 - <br>
<b>Rud Merriam K5RUD</b> <br>
<a href="http://mysticlakesoftware.com/" target="_blank"> <i>Mystic Lake
Software</i> </a> <br>
<br>
</font>
</div>
<div>On 12/17/21 3:18 PM, Pat Caron via
DPRGlist wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-size:small">Here is the
output from Rud's changes:</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">--- Miniterm
on /dev/ttyUSB-sensors 115200,8,N,1 ---<br>
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by
Ctrl+H ---<br>
cm[0] = 0 0 999 999<br>
cm[1] = 95 95 999 999<br>
cm[2] = 91 91 999 999<br>
cm[3] = 84 84 999 999<br>
cm[4] = 251 251 999 999<br>
cm[0] = 0 0 999 999</div>
<div class="gmail_default" style="font-size:small">...Pat C.<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Dec 17, 2021 at 4:04
PM John Swindle via DPRGlist <<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="color:black;font:10pt Arial,Helvetica,sans-serif"><br>
<div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">
From: Rud Merriam via DPRGlist <<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>><br>
To: <a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a><br>
Cc: Rud Merriam <<a href="mailto:rudmerriam@gmail.com" target="_blank">rudmerriam@gmail.com</a>><br>
Sent: Fri, Dec 17, 2021 2:35 pm<br>
Subject: Re: [Dprglist] Arduino Code Troubles<br>
<br>
<div id="gmail-m_2894956073640297808gmail-m_6142257130072753671yiv3997825307">
<div>
<div>Obviously somethine strange happening.
Grasping at a straw try replacing the 'or' in
the conditional with '||'. It shouldn't make a
difference but.... <br clear="none">
</div>
<div>Started to make othere suggestions to
localize the problem but to much verbiage. Here
is what I would try:<br clear="none">
</div>
<pre> for (uint8_t x = 0; x < (SONAR_NUM + IR_NUM); x++) {
Serial.print("cm[");
Serial.print(x);
Serial.print("] = ");
Serial.print(cm[x]);
Serial.print(" ");
if ((cm[x] == 0) || (cm[x] > maxDistance)) {
Serial.print(cm[x]); //
Serial.print(" ");
cm[x] = 999;
Serial.print(cm[x]); //
Serial.print(" ");
}
Serial.println(cm[x]);
}</pre>
<div><br clear="none">
</div>
<div><font face="Comic Sans MS" color="#000080"> <br clear="none">
-73 - <br clear="none">
<b>Rud Merriam K5RUD</b> <br clear="none">
<a rel="nofollow noopener noreferrer" shape="rect" href="http://mysticlakesoftware.com/" target="_blank"> <i>Mystic
Lake Software</i> </a> <br clear="none">
<br clear="none">
</font> </div>
<div id="gmail-m_2894956073640297808gmail-m_6142257130072753671yiv3997825307yqtfd15399">
<div>On 12/17/21 10:13 AM, Pat Caron via
DPRGlist wrote:<br clear="none">
</div>
<blockquote type="cite"> </blockquote>
</div>
</div>
<div id="gmail-m_2894956073640297808gmail-m_6142257130072753671yiv3997825307yqtfd69348">
<div>
<div dir="ltr">
<div style="font-size:small"><br clear="none">
<div style="font-size:small">What I meant to
say last night is the array size is
cm[8]. The values for SONAR_NUM == 3 and
IR_NUM == 2<br clear="none">
This should not be overrunning the array
as it only loops through 5 times.<br clear="none">
I have tried setting maxDistance as
uint32_t without any difference.</div>
<div style="font-size:small">I have
commented out the sendData() function and
added some Serial.print statements prior
to reassigning the values. (shown in
output)</div>
<div style="font-size:small"><br clear="none">
</div>
<div style="font-size:small">#define
SONAR_NUM 3<br clear="none">
#define IR_NUM 2<br clear="none">
uint32_t cm[8] = {0,0,0,0,0,0,0,0}; //
Create array<br clear="none">
uint16_t maxDistance = 200; // Also used
with NewPing.h libraray<br clear="none">
char *position[] = {"us_Left", "us_Mid",
"us_Right", "ir_Left", "ir_Right",
"cm[5]", "cm[6]", "cm[7]"};<br clear="none">
.<br clear="none">
. // Other code here<br clear="none">
.<br clear="none">
<br clear="none">
void oneSensorCycle() { // Sensor ping
cycle complete, do something with the
results.<br clear="none">
for (uint8_t x = 0; x < (SONAR_NUM +
IR_NUM); x++) {<br clear="none">
Serial.print("cm[");<br clear="none">
Serial.print(x);<br clear="none">
Serial.print("] = ");<br clear="none">
Serial.println(cm[x]);<br clear="none">
if ((cm[x] == 0) or (cm[x] >
maxDistance)) {<br clear="none">
cm[x] = 999;<br clear="none">
}<br clear="none">
}<br clear="none">
if (troubleshoot) {<br clear="none">
for (uint8_t i = 0; i < (SONAR_NUM
+ IR_NUM); i++) {<br clear="none">
Serial.print("| ");<br clear="none">
Serial.print(position[i]);<br clear="none">
Serial.print(" = ");<br clear="none">
Serial.print(cm[i]);<br clear="none">
Serial.print("cm ");<br clear="none">
}<br clear="none">
Serial.print("| ");<br clear="none">
Serial.print("Time = ");<br clear="none">
Serial.print(elapsedMillis);<br clear="none">
Serial.print("mS");<br clear="none">
Serial.println();<br clear="none">
}<br clear="none">
//else {<br clear="none">
// sendData();<br clear="none">
//}<br clear="none">
}<br clear="none">
<br clear="none">
<br clear="none">
Loop() {<br clear="none">
</div>
<div style="font-size:small"> .// other
code<br clear="none">
</div>
<div style="font-size:small">
oneSensorCycle()<br clear="none">
</div>
<div style="font-size:small"> . // more
code<br clear="none">
</div>
<div style="font-size:small">}<br clear="none">
<br clear="none">
Serial output:<br clear="none">
<br clear="none">
-- Miniterm on /dev/ttyUSB-sensors
115200,8,N,1 ---<br clear="none">
--- Quit: Ctrl+C | Menu: Ctrl+T | Help:
Ctrl+T followed by Ctrl+H ---<br clear="none">
cm[0] = 0<br clear="none">
cm[1] = 95<br clear="none">
cm[2] = 91<br clear="none">
cm[3] = 85<br clear="none">
cm[4] = 246<br clear="none">
| us_Left = 999cm | us_Mid = 999cm |
us_Right = 999cm | ir_Left = 999cm |
ir_Right = 999cm | Time = 44mS<br clear="none">
<br clear="none">
...Pat C<br clear="none">
<br clear="none">
</div>
</div>
</div>
<br clear="none">
<div>
<div dir="ltr">On Fri, Dec 17, 2021 at 10:07
AM Chris Netter <<a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:netterchris@gmail.com" target="_blank">netterchris@gmail.com</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div>
<div>The for loop stops at x < 8, so
it won’t overrun.</div>
<div> </div>
<div>What if you remove the sendData()
call? Does that help?</div>
<div> </div>
<div>Also, make sure you have declared
any global variables which are
modified by interrupts or other tasks
as “volatile”, otherwise the compile
may decide to optimize away parts of
your code.</div>
<div> </div>
<div>Chris</div>
<div> </div>
<div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in">
<div style="border:medium none;padding:0in"><b>From: </b><a rel="nofollow noopener noreferrer" shape="rect" href="mailto:paradug@gmail.com" target="_blank">Doug
Paradis</a><br clear="none">
<b>Sent: </b>Thursday, December 16,
2021 11:46 PM<br clear="none">
<b>To: </b><a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:netterchris@gmail.com" target="_blank">Chris
Netter</a><br clear="none">
<b>Cc: </b><a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:patcaron@mail.com" target="_blank">Pat Caron</a>;
<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a><br clear="none">
<b>Subject: </b>Re: [Dprglist]
Arduino Code Troubles</div>
</div>
<div> </div>
<div>
<div>Pat,</div>
<div>
<div> for (uint8_t x = 0; x <
(SONAR_NUM + IR_NUM); x++) {</div>
</div>
<div>
<div> </div>
</div>
<div>
<div> If SONAR_NUM _ IR_NUM = 8
then you are overrunning the array
which goes 0 to 7.</div>
</div>
<div>
<div> </div>
</div>
<div>
<div>Regards,</div>
</div>
<div>
<div>Doug P.</div>
</div>
</div>
<div> </div>
<div>
<div>
<div>On Thu, Dec 16, 2021 at 8:53 PM
Chris Netter via DPRGlist <<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:</div>
</div>
<blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>So Markus and Karim already
pointed out that the original
code snipped works as
designed.</div>
<div> </div>
<div>It’s also been pointed out
already that you are mixing
data types. I don’t think
that’s the issue, but worth
trying to make both the array
and maxDistance uint16_t</div>
<div> </div>
<div>As for this new code
snippet:</div>
<div> </div>
<div>I don’t see any obvious
issue with the for loop. Are
you positive that <span style="font-size:12pt">SONAR_NUM
+ IR_NUM == 8 ? if not,
you are overshooting the
array and that can cause all
kinds of non-obvious issues.</span></div>
<div><span style="font-size:12pt"> </span></div>
<div><span style="font-size:12pt">Also,
what does sendData() do?
Could it have some
side-effects? Maybe its
causing a stack overflow,
array bounds overflow, or
similar, which in turn
causes non-obvious issues?</span></div>
<div> </div>
<div> </div>
<div> </div>
<div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in">
<div><b>From: </b><a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">Pat
Caron via DPRGlist</a><br clear="none">
<b>Sent: </b>Thursday,
December 16, 2021 9:04 PM<br clear="none">
<b>To: </b><a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a><br clear="none">
<b>Subject: </b>Re:
[Dprglist] Arduino Code
Troubles</div>
</div>
<div> </div>
<div>
<div>
<div><span style="font-size:12pt">Hi
guys, here is a better
example to show what is
happening taken from
actual code:</span></div>
</div>
<div>
<div><span style="font-size:12pt"> </span></div>
</div>
<div>
<div><span style="font-size:12pt">....
other code<br clear="none">
for (uint8_t x = 0; x
< (SONAR_NUM +
IR_NUM); x++) { //
SONAR_NUM + IR_NUM = 8<br clear="none">
if ((cm[x] == 0) ||
(cm[x] >
maxDistance)) {<br clear="none">
cm[x] = 999;<br clear="none">
}</span></div>
</div>
<div>
<div><span style="font-size:12pt">
sendData();</span></div>
</div>
<div>
<div><span style="font-size:12pt">
}<br clear="none">
<br clear="none">
Printed values cm[0] to
cm[5] (us_Left to
ir_Right) without the
above if statement<br clear="none">
| us_Left = 0cm | us_Mid
= 95cm | us_Right = 51cm
| ir_Left = 84cm |
ir_Right = 252cm | Time
= 45mS<br clear="none">
<br clear="none">
Printed values cm[0] to
cm[5] with the above if
statement<br clear="none">
\| us_Left = 999cm |
us_Mid = 999cm |
us_Right = 999cm |
ir_Left = 999cm |
ir_Right = 999cm | Time
= 44mS<br clear="none">
<br clear="none">
...Pat C</span></div>
</div>
</div>
<div> </div>
<div>
<div>
<div>On Thu, Dec 16, 2021 at
8:45 PM Karim Virani <<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:pondersome64@gmail.com" target="_blank">pondersome64@gmail.com</a>>
wrote:</div>
</div>
<blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<div>It's doing what it's
coded to do</div>
</div>
<div> </div>
<div>
<div>
<div>On Thu, Dec 16,
2021 at 7:42 PM Pat
Caron via DPRGlist
<<a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:</div>
</div>
<blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<div>
<div><span style="font-size:12pt">Hi
Murray, I did
try that with
the same
results.
NewPing.h
library is
looking for a
uint16_t
although it
didn't complain
when I tried
that.</span></div>
</div>
<div>
<div><span style="font-size:12pt"> </span></div>
</div>
<div>
<div><span style="font-size:12pt">...Pat
C</span></div>
</div>
</div>
<div> </div>
<div>
<div>
<div>On Thu, Dec 16,
2021 at 8:35 PM
Murray Altheim via
DPRGlist <<a rel="nofollow
noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>> wrote:</div>
</div>
<blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>Hi Pat,<br clear="none">
<br clear="none">
What if you define
maxDistance as
uint32_t?<br clear="none">
<br clear="none">
Cheers,<br clear="none">
<br clear="none">
Murray<br clear="none">
<br clear="none">
On 17/12/21 2:27
pm, Pat Caron via
DPRGlist wrote:<br clear="none">
> Hi guys, I'm
looking for help
with the following
Arduino code.<br clear="none">
> <br clear="none">
> uint32_t
cm[8] =
{0,0,0,0,0,0,0,0};
// Create array<br clear="none">
> uint16_t
maxDistance = 200;
// Also used with
NewPing.h library<br clear="none">
> .<br clear="none">
> . //
Other code here<br clear="none">
> .<br clear="none">
>
irSensorL.read();
// Read IR
sensor... This is
working!<br clear="none">
> cm[3] =
irSensorL.ranging_data.range_mm/10; // This returns 268<br clear="none">
> if
(cm[3] >
maxDistance) {<br clear="none">
> cm[3]
= 999;
/<br clear="none">
> }<br clear="none">
>
Serial.println(cm[3]);
/ cm[3] value is
always = 999<br clear="none">
>
sendData();<br clear="none">
> <br clear="none">
> The cm[3]
value is always
999 when I run
this.<br clear="none">
> If I comment
out the if
cm[3]... statement
cm[3] value is
then 268.<br clear="none">
> <br clear="none">
> ...Pat C<br clear="none">
> <br clear="none">
>
_______________________________________________<br clear="none">
> DPRGlist
mailing list<br clear="none">
> <a rel="nofollow
noopener
noreferrer" shape="rect" href="mailto:DPRGlist@lists.dprg.org" target="_blank">DPRGlist@lists.dprg.org</a><br clear="none">
> <a rel="nofollow
noopener
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> <br clear="none">
<br clear="none">
-- <br clear="none">
<br clear="none">
.........................................................................<br clear="none">
Murray Altheim
<murray18 at
altheim dot
com>
= =
===<br clear="none">
<a rel="nofollow
noopener
noreferrer" shape="rect" href="http://www.altheim.com/murray/" target="_blank">http://www.altheim.com/murray/</a>
=== ===<br clear="none">
= =
===<br clear="none">
In the
evening<br clear="none">
The rice
leaves in the
garden<br clear="none">
Rustle in the
autumn wind<br clear="none">
That blows
through my reed
hut.<br clear="none">
--
Minamoto no
Tsunenobu<br clear="none">
<br clear="none">
_______________________________________________<br clear="none">
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</blockquote>
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